远程设计连接发生未知错误是啥原因呢

com.fr.workspace.engine.exception.RemoteDesignUnknownException: com.fr.workspace.engine.exception.WorkspaceConnectionException: Response HTTP/1.1 400  by 

at com.fr.workspace.engine.convert.UnknownErrorConverter.convert(UnknownErrorConverter.java)

at com.fr.workspace.engine.convert.UnknownErrorConverter.convert(UnknownErrorConverter.java)

at com.fr.workspace.engine.convert.ExceptionConverter.convert(ExceptionConverter.java)

at com.fr.workspace.engine.channel.http.WorkspaceHttpConnector.compatibleGet(WorkspaceHttpConnector.java)

at com.fr.workspace.engine.channel.http.WorkspaceHttpConnector.get(WorkspaceHttpConnector.java)

at com.fr.workspace.engine.channel.http.WorkspaceHttpConnector.get(WorkspaceHttpConnector.java)

at com.fr.workspace.engine.channel.http.FunctionalHttpRequest.validateVT(FunctionalHttpRequest.java)

at com.fr.workspace.engine.channel.WorkspaceChannelFactory.testConnection(WorkspaceChannelFactory.java)

at com.fr.workspace.engine.client.FineWorkspaceConnector.testConnection(FineWorkspaceConnector.java)

at com.fr.env.RemoteEnvPane$7.doInBackground(RemoteEnvPane.java:595)

at com.fr.env.RemoteEnvPane$7.doInBackground(RemoteEnvPane.java:591)

at javax.swing.SwingWorker$1.call(SwingWorker.java:295)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at javax.swing.SwingWorker.run(SwingWorker.java:334)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at java.lang.Thread.run(Thread.java:748)

Caused by: com.fr.workspace.engine.exception.WorkspaceConnectionException: Response HTTP/1.1 400  by

at com.fr.workspace.engine.channel.http.WorkspaceHttpConnector.execute(WorkspaceHttpConnector.java)

... 14 more

 

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